The French village of Allouville-Bellefosse is famous for the Chêne Chapelle (Oak Chapel), which is literally a chapel built into an oak tree.
The amazing architecture consists of a wooden staircase spiraling around the ancient tree, leading up to a couple of chambers. These rooms have always been used as places of worship, by the village locals.
The tree is known to have been growing as far back as the thirteenth century, during the rule of Louis IX, when France was a truly centralized kingdom. It is also known to have survived the Hundred Years War against the English, the Black Death, the Reformation, and Napoleon’s rule.